This vintage engine compression tester is a reliable tool for anyone working on their motorcycle, ATV, passenger vehicle, or heavy duty/commercial vehicle. The Sears Penske gauge has a maximum PSI of 300 and is perfect for testing the compression of your engine. This compression tester is a valuable addition to any mechanic's tool collection and will help you diagnose any engine issues with ease. The 1970's design adds a touch of nostalgia to your garage. Don't miss out on this must-have tool for any vehicle owner.